Aside from your interest in temperatures at specific locations, you may want to adjust your OE dash gauges.
As you probably know, these OE dash gauges, especially the temp and gas gauge, at best show approximations. I added good quality aftermarket gauges, including a voltage gauge. Then when I re-wired the backside of the dash board, I disassembled the OE gauge assembly and re-calibrated each of the OE gauges to best show what the mechanical gauges displayed. The OE temp and gas gauges required the most adjustment.